Although originally classified as a trilophosaur, Tricuspisaurus was reclassified as a procolophonid in 1993 by paleontologists Hans-Dieter Sues and Paul E. Olsen.[2] This was due to similarities between its tricuspid teeth and those of the newly described procolophonid Xenodiphyodon. Along with Tricuspisaurus, Variodens and Trilophosaurus jacobsi were also considered to be procolophonids.[3] However, more recently described cranial material from T. jacobsi indicates that it is a trilophosaur, which suggests that Tricuspisaurus is also a trilophosaur rather than a procolophonid.[4]

↑ Fraser, N.C. (1997). "Assemblages of small tetrapods from British Late Triassic fissure deposits". In Fraser, N.C. and Sues, H.-D. (eds.). In the Shadow of the Dinosaurs: Early Mesozoic Tetrapods. Cambridge and New York: Cambridge University Press. pp.214–225. ISBN9780521458993. CS1 maint: Uses editors parameter (link)